1965 AHSME Problems/Problem 39

Problem

A foreman noticed an inspector checking a $3$ "-hole with a $2$ "-plug and a $1$ "-plug and suggested that two more gauges be inserted to be sure that the fit was snug. If the new gauges are alike, then the diameter, $d$ , of each, to the nearest hundredth of an inch, is:

$\textbf{(A)}\ .87 \qquad \textbf{(B) }\ .86 \qquad \textbf{(C) }\ .83 \qquad \textbf{(D) }\ .75 \qquad \textbf{(E) }\ .71$

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1965 AHSME Problems/Problem 39

Problem